mbc0 Posted February 21, 2020 Share Posted February 21, 2020 Hi, I have 3 unraid servers and with two of them I would like to add a 2nd cache drive. I have had a bit of a scan around and found some old threads, just wondering if anyone has done this recently and has any advice/warnings? obviously the cache is the most important drive when it comes to all my appdata! Thanks in advance! Quote Link to comment
JonathanM Posted February 22, 2020 Share Posted February 22, 2020 If your existing single cache drive is BTRFS, then it's probably going to be ok. However... you do have regular backups of your appdata and any cache:only/prefer shares, right? If your server isn't rock solid, I'd strongly recommend staying with a single drive. It seems like there are many more issues reported with BTRFS cache pools than there are with single XFS cache drives. Also, what size are the existing drives, and what size are you planning on adding? Quote Link to comment
mbc0 Posted February 22, 2020 Author Share Posted February 22, 2020 Hi, Thanks for your reply! Both systems I intend to upgrade are BTRFS and both servers are rock solid, I carry out a backup every 3 days, I would do it more often but it takes 4-5 hours to complete. I was unaware of potential issues with cache pools, I was just looking for a way to protect against a single cache failure. The first system is a 1TB Samsung Pro Evo 970 NVME and the second is a standard Crucial 1TB SSD, I was looking to just get duplicate drives Quote Link to comment
JonathanM Posted February 22, 2020 Share Posted February 22, 2020 Sounds like a solid plan. Not everyone has issues with BTRFS, but it's not tolerant of memory issues or power cuts, which is why I mentioned server stability. Quote Link to comment
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